Substations Middle Voltage up to 36kVPrefabricated Substations Middle Voltage are facilities of the electric power system. They are designed to accept, transform and distribute electric power. They accept electricity from the electric network MV 10,20,35kV by cable or air inputs. According their functions substations are Transformer Substations MV/LV or Distribution Substations MV. They may realise additional functions regarding requirements and design project.